Pardimin P, Rochmiyati S, Wijayanto Z, Supriadi D. Flipped classroom as a reform approach to learning mathematics in pandemic COVID-19. Int. J. of Health Sci. [Internet]. 2022 May 30 [cited 2025 Oct. 10];6(2):758-70. Available from: https://sciencescholar.us/journal/index.php/ijhs/article/view/7988